Acquisition of proper cardiac MR images is highly limited by continued heart motion and apnea periods. A typical
acquisition results in volumes with inter-slice separations of up to 8 mm. This paper presents a super-resolution
strategy that estimates a high-resolution image from a set of low-resolution image series acquired in different non-orthogonal orientations. The proposal is based on a Bayesian approach that implements a Maximum a Posteriori
(MAP) estimator combined with a Wiener filter. A pre-processing stage was also included, to correct or eliminate
differences in the image intensities and to transform the low-resolution images to a common spatial reference
system. The MAP estimation includes an observation image model that represents the different contributions to
the voxel intensities based on a 3D Gaussian function. A quantitative and qualitative assessment was performed
using synthetic and real images, showing that the proposed approach produces a high-resolution image with
significant improvements (about 3dB in PSNR) with respect to a simple trilinear interpolation. The Wiener
filter shows little contribution to the final result, demonstrating that the MAP uniformity prior is able to filter
out a large amount of the acquisition noise.